Fix SWA CLI scripts across all 4 web frameworks

[Copilot]

The SWA CLI scripts across Angular, React, Svelte, and Vue had several configuration issues that prevented them from working correctly. This PR addresses all identified problems:

Issues Fixed

1. Missing Dependencies

• Angular & React: Added missing concurrently dependency that was being used in scripts but not declared in devDependencies

2. Incorrect Script References

• Angular: Fixed scripts referencing non-existent dev command, changed to use correct start script

  - "start-angular-fastify": "concurrently \"npm run fastify-dev\" \"VITE_API=http://0.0.0.0:3000/api npm run dev\""
  + "start-angular-fastify": "concurrently \"npm run fastify-dev\" \"npm run start\""

3. Port Conflicts

• React: Resolved port conflict where both React app and Fastify API tried to use port 3000
  • React app now uses port 3001 when running with Fastify
  • API server stays on port 3000

  - "start-react-fastify-swa": "...start http://0.0.0.0:3000 --api-devserver-url http://0.0.0.0:3000..."
  + "start-react-fastify-swa": "...start http://localhost:3001 --api-devserver-url http://localhost:3000 --run 'PORT=3001 npm run start'"

4. Inappropriate Environment Variables

• Angular, React, Vue: Removed VITE_API environment variables from frameworks that don't use Vite
• Svelte: Kept VITE_API since it appropriately uses Vite

5. Host Configuration Cleanup

• Standardized all scripts to use localhost instead of inconsistent 0.0.0.0 addressing
• Removed unnecessary --host flags for better cross-platform compatibility

Validated Scripts

All SWA CLI scripts now work correctly across all frameworks:

Framework	Azure Functions	Fastify API	Direct Fastify
Angular	✅ start-angular-func-swa	✅ start-angular-fastify-swa	✅ start-angular-fastify
React	✅ start-react-func-swa	✅ start-react-fastify-swa	✅ start-react-fastify
Svelte	✅ start-svelte-func-swa	✅ start-svelte-fastify-swa	✅ start-svelte-fastify
Vue	✅ start-vue-func-swa	✅ start-vue-fastify-swa	✅ start-vue-fastify

Testing

• Verified all package.json scripts parse correctly
• Tested script execution to ensure SWA CLI invocation works
• Confirmed concurrently dependency resolution
• Validated port configurations prevent conflicts

Fixes #78.

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